Pneumatic tire tread and buttress



FIG. 1 is a front elevation view of a pneumatic tire tread and buttress showing our new design, it being understood that the pattern is repeated uniformly throughout the circumference of the tread and buttress;

FIG. 2 is a perspective view thereof; and,

FIG. 3 is a side elevation view thereof on a reduced scale, the opposite side being a mirror image of that shown.

The broken line showing of environmental structure in FIGS. 2 and 3 of the drawing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a pneumatic tire tread and buttress, as shown and described. 